Process of and apparatus for molding building blocks



March 1l, 1930. G. W. DUNN l 1,750,511

PRooEss oF AND APPARATUS FOR MoLDING BUILDING BLocKs Filed June 11, 1926INVEN TOR.

Y :gew/s @VMM ATTORNEY.

Patented Mar. l1, 190

GEORGE W. DUNN, F NEWPORT, KENTUCKY PROCESS OFANI) APPARATUS FOR HOLDINGBUILDING BLOCKS V'Application -111116. June 11,

My invention relates to building blocks and methods of molding suchblocks, and particularly to a novel type of block and the provision ofmeans of making such tile into readily divisible units, which combined,will make one whole tile.

It is the object of my invention to provide 'a new type of mold formolding building blocks, and in conjunction with this type of mold, toprovide means of molding blocks which will be readily separable intoJfractional tiles or portionsof tiles, which combined, will form onewhole tile.

In the art, molds for making concrete building blocks have been quiteextensively developed, and although the novelv block which Ispecifically disclose herein possesses decorative value which will formthe subject of a design patent application, my mechanical inventionrelates to the molding ,of blocks, and to the provision of novel meanswhich may be used in combination with one set ofmolds which will enablethe manufacturer to make quarter, half and three quarter blocks z5without the need of additional molding plates for making block unitssmaller than the regular fulll size block. Y,

In the art, quarter size, half size and three quarter blocks have alwaysrequired quarter,

'30 half and three quarter sectional dies and division plates formolding. My invention contemplates the use of a standard size mold formolding a block, and when I desireeto make quarter size, half size andthree quarter sized blocks, I utilize the same dies and merely insert acleavage die which will enable the block to be molded in full size, andthen be readily separated into divisional sizes by a light tap with amasons tool. While the principleinvolved is adapted for different sizedbuilding blocks, I disclaim the use thereof, except in combination withblocks having faces molded so as to represent a series of straight edgebricks laid in a plurality of rows in staggered relation.

Referring to the drawings in which I have shown the preferred t eof-block and the mold with which it may e made Figure 1 is a perspectiveview of an assembled mold withthe cooperating parts in y finished block,which will enable the block to 192e. serial Ne. 115,366.

molding` osition, and with a cutaway section of the mo d showing theinner appearance.

Figure 2 is a perspective view of a normal full sized block.

Figure 3 is a perspective View of a full 4545 sized block, which will bereadily divisible into a one quarter and a three quarter sized block. dFigure 4 is a side elevation of the cleavage Figure 5 is an endelevation of the shown in Figure 4. Figure 6 isa plan view of the dieshown in Figures 4 and 5.

Generally indicated at 1 is the mold which forms the impression on theouter face of the tile. YAs shown in Figures 2 and 3, the outer face ofthe tile islformed to appear similar to four rows of straight edgedbricks. rIhe upper row shows two bricks with a vertical rib 2, whichindicates the joint between the straight edges of the upper course. Thesecond row has two ribs 3 and 4, which divide the second course into acourse in staggered relation to the to course, having the groovesindicating the e ges of adjoining bricks 3a' and 4B. The third courseisshown as corresponding to the top course, and the bo-ttom or fourthcourse corresponds with the second course.

The end mold, which molds the side facing of a tile which is .to beusedat the corner of a building, isv indicated at 5, and although theimpression face of the mold is not shown, it will be readily understoodthat vit corresponds to the front face die, vso that the courses ofbricks will appear similarly to the appearance of four courses ofbricks.

I rovide for indentin'g a cleavage line in the ace of the block, a toolindicated at 6, which has interspaced grooves 7 and elevatedl portions8, which when disposed within the mold aligned with either a half orquarter position, will provide a vertical groove in the G0 die bereadily separated into smaller units. The tool may be reversible as thatindicated, so that by reversing the tool, the same tool may be used inreverse at the dierent divisional positions. It will be noted in thisconnection, 100

i that a cleavage die is indicated in position at 6a in Figure l. Inthis position after molding the block will be readily cut into a quarterand three quarter piece with a masonfs' hammer. Should it be desired tomake two half size blocks, the tool will be inverted and placed alongthe middle line of the die. In

" this Iposition, the grooves 7 which fitted against the webs 3 and thecorresponding web' of the lower course, will, in a reversed position,fit against the vertical web 2 of the upper course and the vertical webcorresponding in the third course.

In Figure 3, the cleavage groove made by the tool is shown at 78. Itwill be possible to make cleavage grooves along the corner v edges ofthe block, if desired, in a similar manner, as long as there are regularlines indicating the courses of bricks. IIhe tool will be adaptable forany desired segmentary cleavage, as long as such cleavage occurs alongdivisional lines of courses.

Modifications in the depth and size of cleavage dies will readily occurto those in molding with a standard sized die, a face of a brick withthe die provided with portions to indicate staggered courses ofaplurality of rows of straight edged bricks, and securing against saiddie `means forming a vertical cleavage groove on the face of the brickalong a line adjacent a divisional 'line between. the bricks of one ofsaid indicated courses.

2. A process of molding blocks, which consists in providin a die havingvertical interspaced ribs indicating alternate rows of bricks, andhorizontal ribs indicating course divisions, securing against a seriesof interspaced ribs a tool having projections corresponding to said ribsand grooves for filling the spaces between the ribs, and molding ablock, with the tool providing a readily fractured indentation dividingthe face of said block into units of such size as the length of onebrick bears to the length of said block.

3. In combination with a molding die for molding the face of a buildingblock, so as to represent a series of courses of bricks with'k alternatecourses in staggered relation, a tool adapted to form a readilydivisible cleavage line on the face of the molded block along linesrepresenting whole and half bricks. i

4. In combination with means for molding a building block with ay facerepresenting a series of courses of bricks in staggered relation, meansfor indenting said face during the molding operation so as to providecleavdie, having horizontal ribs for molding rep-4 resentations ofcourses of bricks and vertical ribs for representing individual bricksin courses 1n staggered relation, an auxiliary die havlng portionsadapted to engage said vertical ribs and extend within the face of ablock to be molded.

7 ..In combination with a block molding dle, -having horizontal ribs formolding representations of coursesof bricks and vertical ribs forrepresenting individual bricks in .courses in staggered relation, anau'xiliary d1e having portions adapted to engage said block to bemolded, said auxiliary die being reversible so as to engage ribs in saiddie in more than` one vertical position.

8. In combination with a block molding die, having horizontal ribs formolding representations of courses of bricks and vertical ribs forrepresenting individual bricks in courses in staggered relation, anauxiliary die having portions adapted to engage said vertical ribs andextend within the face of a block to be molded, with means of retainingsaid auxiliary die against said moldin die.

GEORGE W. D NN.

` vertical ribs and extend within the face of a 'I los'

